Ksp Mg(OH)₂ adalah 33,66. 10⁻¹².
Penjelasan dengan langkah-langkah:
Diketahui:
Mg(OH)₂
V = 100 mL
m Mg(OH)₂ = 1,18 mg
Ar Mg = 24
Ar O = 16
Ar H = 1
Ditanyakan:
Ralat soal: mencari Ksp Mg(OH)₂
Jawab:
- Menentukan Mr Mg(OH)₂.
Mr Mg(OH)₂ = Ar Mg + 2. Ar O + 2. Ar H
Mr Mg(OH)₂ = 24 + 2. 16 + 2. 1
Mr Mg(OH)₂ = 24 + 32 + 2
Mr Mg(OH)₂ = 24 + 34
Mr Mg(OH)₂ = 58
- Menentukan jumlah mol Mg(OH)₂.
n Mg(OH)₂ = m/Mr
n Mg(OH)₂ = 0,00118/58
n Mg(OH)₂ = 2,034. 10⁻⁵ mol
- Menentukan konsentrasi Mg(OH)₂.
[Mg(OH)₂] = n/V
[Mg(OH)₂] = 2,034. 10⁻⁵/0,1
[Mg(OH)₂] = 2,034. 10⁻⁴ M
- Menentukan Ksp Mg(OH)₂.
Mg(OH)₂ ⇄ Mg²⁺ + 2OH⁻
s s 2s
Ksp Mg(OH)₂ = [Mg²⁺] [OH⁻]²
Ksp Mg(OH)₂ = (s) (2s)²
Ksp Mg(OH)₂ = 4s³
Ksp Mg(OH)₂ = 4(2,034. 10⁻⁴)³
Ksp Mg(OH)₂ = 33,659901216. 10⁻¹²
Ksp Mg(OH)₂ = 33,66. 10⁻¹²
Pelajari lebih lanjut
Menentukan Ksp https://brainly.co.id/tugas/22730582, https://brainly.co.id/tugas/27973485
#BelajarBersamaBrainly
[answer.2.content]
